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CIM Issues #7027

WireInfo inconsistency with Electropedia

Added by Celso Rocha 2 months ago.

Status:
New
Priority:
Normal
Author/Contact Info:
Celso Rocha (crocha@epri.com), Andres Ovalle (aovalle@epri.com)
Base Release:
Solution to be Applied To:
Solution Version:
Solution Applied By:
Completion Date:
CIM Keywords:
61968-AssetInfo, 61970-Wires
Breaking Change:
Breaking Change Description:
CIM Impacted Groups:
WG13, WG14
Requestor:
Standard(s):

61968-4, 61968-11

Version:
Clause:
Sub-Clause:
Paragraph:
Table:
Originally Closed in Version:
Origination Date:
Origination ID:
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Description

According to Electropedia:
• In the context of Overhead lines: (466-10-02)

wire
strand

one of the individual wires used in the manufacture of a stranded conductor

• In the context of Electrical and magnetic devices: (151-12-28)

wire

flexible cylindrical conductor, with or without an insulating covering, the length of which is large with respect to its cross-sectional dimensions

In the context of cables, you also have (461-01-07):

• stranded conductor

conductor consisting of a number of individual wires or strands all or some of which generally have a helical form
Note 1 – The cross-section of a stranded conductor may be circular or otherwise shaped.

Note 2 – The term “strand” is also used to designate a single wire .

In other words, within IEC vocabulary, wire is a synonym of strand. However, WireInfo in 61968-4 is a ConductorInfo that can have multiple strands, which is inconsistent with Electropedia. Since there are several changes being proposed to WireInfo and CableInfo classes as part of issue #6870, this seems a good timing to rename WireInfo to better allign with Electropedia. Main users of this class is perhaps WG 13 as it is used to describe conductor characteristics for line impedance computation.

Proposed Solution

Since wire/strand are flexible conductors, and RigidBusbarInfo has recently been added in 61968-4 as a child of ConductorInfo, we propose renaming WireInfo to FlexibleConductorInfo (as opposed to RigidBusbarInfo).

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